https://tv.404again.com/videos/watch/7eee7f46-7c8a-42ca-bf91-03fad89a983b Learn to code - https://www.boot.dev?promo=BOOTSTUBE In 1956, IBM's RAMAC stored about 4 megabytes in a cabinet that weighed over a ton — and for the next fifty years the fundamental design of the hard drive barely changed, even as CPUs, RAM, and networks got thousands of times faster. This video covers how spinning disks actually worked, how NAND flash replaced them by trapping electrons in a tiny insulated pocket, and why a ~9,000x jump in random reads quietly invalidated a lot of the software assumptions we inherited from the disk era. Timestamps: 00:00 The click of death 02:48 The first hard drive 04:27 How a hard drive actually works 06:02 Latency: seek and rotate 07:58 2x vs 9,000x 09:52 Flash memory and NAND 12:48 Inside an SSD 14:56 Cheaper, denser, faster 17:46 What it means for your code 19:48 The catch: SSDs forget 21:31 Outro Sources: https://www.boot.dev/blog/news/why-hard-drives-didnt-change Wed, 19 Aug 2026 15:10:20 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://tv.404again.com https://tv.404again.com/lazy-static/avatars/410ce373-aedc-4473-ae02-64fd025b426d.png https://tv.404again.com/videos/watch/7eee7f46-7c8a-42ca-bf91-03fad89a983b All rights reserved, unless otherwise specified in the terms specified at https://tv.404again.com/about and potential licenses granted by each content's rightholder.